Bowling-pin



E. P. GRIGNON.

BOWLING PIN.

APPLICATION FILED on. a. 1919.

PatentedAl lg. 31,1920;

EPHIBIAIMI. GRIGNON, OF APPLETON, WISCONSIN.

nowLmG-rnr.

Specification of Letters Patent.

Patented Aug. 31, 1920.

Application filed October 8, 1919. Serial No. 329,289.

To all whom it may concern:

Be it known that I, EPHRAIM P. GmoNoN, a citizen of the United States, and resident of A pleton, in the county of Outag'amie, in the tate of Wisconsin, have invented new and useful Improvements in Bowling-Pins,

of which the following is a description, reference being had to the accompanyin drawjects to provide a bowling pin in s, which-are a part of this speci cation. he present invention relates to certain new and useful improvements in bowling pins or the like and the method of constructingrsame.

' he bowling pins now in general everyday use are made either from a single block of wood, or a plurality of layers or laminee cemented to ether and turned to shape.

Both of these orms have proven unsatisfactory, the first in that it is hard to obtain a single block of wood of a necessary size without imperfections, and further that the grain of the wood is presented to the surface at all angles and thus readily chips when subjected to severe blows.

The second is objectionable in that the outer layers of the laminae are practically a thin veneer when the block is finally shaped and thus when subjected to ablow often splinters, and then further,'the outermost layers of laminae do not extend upwardly throughout the full length of the pin as will be readily understood thus considerably weakening the construction.

With these and other inherent objects in mind, my invention has for one of its obformed from a plurality of substantially V-shaped segments cemented together to form a substantiall cone shaped block for shaping into the owling pin.

vAnother object of my invention is to provide a bowling pin formed from a plurality of cemented together substantially V-shaped segments in which the grain of the wood of each segment is at substantially right angles with respect to the outer face thereof.

A further object of my invention is to provide a bowling pin constructed as above described which will be provided with a central core for convenience in manufacturing the bowling pin and for strengthening the same.

A still further object of the present invention is to provide a bowling pm of the class described which will be of comparatively cheap construction, all thin s considered, and will be possessed 0 great strength, so that the same will withstand severe shocks without damage thereto.

With the above and other objects in view which will appear as the description proceeds, my invention resides in the novel construction, combination and arrangement of parts, substantially as hereinafter described,

and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

In the accompanying drawin I 'have illustrated one complete examp e of the physical embodiment ofmy invention constructed according to the best mode I have so far devised for the practical a plication of the principles thereof, and in w ich:

Figure 1 is a sectional view through a part of a tree or block of wood illustrating the manner'of cutting the various segments employed in the manufacture of my bowli e p ig. 2 is a bottom plan view of the assembled cone formed ofa plurality of cemented together segments.

Fig. 3 is a side elevational view of the cone.

Fig. 4 is a perspective view of the dowel pin or reinforcing core for the bowling pin.

Fig. 5 is a top plan view of the completed.

bowling pin, and

Fig. 6 is a side elevational view of the completed bowling pin.

Fig. 7 is a side elevational view of another shape of block formed from a plurality of segments which I may employ.

Referring now more particularly to the accompanying drawing, the numeral 10 designates a bowling pin of the usual shape and formed from a plurality of segments 11 pressed and glued together and then provided with a central tapered bore 12 in which is disposed a tapered dowel pin 13 forming a core.

. The segments 11 are out from a tree or block of wood 14 in the form of a parallelogram, bisected, as at 15, to form the segments 11. The bisecting cut or line 15 is not extended from the opposite corners of the parallelosee Fig. 1, which is then diagonally gram, but is extended from a point slightl spaced from the opposite corners thereo Whereb apex 0 each V-shaped segment. The gram of the Wood as indicated in Fig. 1 runs substantially longitudinal with respect to the parallelogram, so that When thesegmentsll are formed, the grain of the wood will be substantially at right angles with the outer facin 17 of the segments 11,- as best shown in ig. 2.

The segments then have their faces 18 coated with an adhesive and are then pressed into a substantially cone shaped structure, see Figs. 2 and 3, and thus held together until the adhesive becomes set when the cone shaped block or blank shown in Fig. 3 will be formed. The blunt ends 16 of the segments 11 permit the positive forcing together of the faces 18 of adjacent segments, in that the possibility of the inner end of one segment being longer than the other will have no effect as will be readily understood. The bore or opening thus centrally formed in the cone shaped-block is drilled out to form the tapered bore 12 of the completed pin and the cone shaped block is then turned down to the shape desired which is that illustrated in Fig. 6.

The dowel pin 13 is forced into the central bore 12 either before the cone shaped block has been turned down or afterward, and to insure the even distribution of an adhesive to the side walls of the bore 12, the opening 13 is provided with a spiral groove 20, which will carry the adhesive and distribute the same upon the side walls of the bore 12. The functions of the dowel pin or core 13 are two-fold, first in that the manufacture of the bowling pin is greatly" facilitated, in that slight imperfections formed in cutting the segments 11, where they are brought to a sharp point at their inner ends, would render it impossible to firmly cement the segments together, and the core 13 forms a bearing for each segment, thus distributing the resistance equally to all the segments, regardless of the tenacity of the adhesive.

Cutting'the segments 11 from blocks ofsubstantially I wood with the wood grain at right angles totheir outer faces, prevents any sharp angles between the outer circumference of" the completed bowling pin and the wood grain and thus chipping of the pin is practically eliminated. Furthermore, when the pin is made from a single block of wood, it is very expensive to select a block of the proper size free from imper fections whereas it is comparatively easy to obtain pieces of wood of the size necessary to form the segments 11 which are free from imperfections.

From the foregoing description taken in to provide a blunt end 16 at thecutting a plurality I of the plank,

connection with the accompanying drawings, it is at once apparent that I provide a bowling pin which Will be durable and capable. of withstanding severe shocks without the splintering of the various segments forming part of the same.

In Fig. 7, I have illustrated a polygonal shaped block formed of segments which have been shaped by a molding machine, in which case the inner ends of the segments will have been cut so that the assembled block will be provided with an even bore for receiving the core without the necessity of drilling or reaming.

What I claim as my invention is:

1. As an article of manufacture, a solid bowling pin consisting of a plurality of substantially V-shaped segments secured together to form a unitary structure, the apex of said segments being on a straight perpendicular line. i

2. As an article ing pin consisting of a plurality of segments of equal length secured together to form a unitary structure having a central bore, and a core member of a length sub stantially equal to the length of said seg ments and having a snug fit in said bore.

3. As an article of manufacture, a bowling pin comprising a plurality of segments cemented together to form a unitary structure having a central bore, and a core having a snug fit in said bore, said core being spirally grooved to insure the even distribution of a securing cement about the bore when the core issecured therein.

, 4. An an article of manufacture, a bowl-, ing pin comprising a plurality of segments cemented together to form a unitary structure having. a tapering central bore, and a tapered pin adapted to be forced in said tapered bore to have a snug fit therein and provide a core for the bowling pin, said tapered pin having a groove therein whereby a cement may be distributed to the walls of the central bore when the tapered pin is disposed thereln.

5. As an article of manufacture, a wooden bowling pin consisting of a plurality of substantially V-shaped segments secured together to form a unitary structure, said segments each being cut from a block of wood so that their grainwill be at substantially right angles to their outer faces.-

6. The herein described method of constructing bowling pins which consists in of blocks from a plank parallel with the wood grain then bisecting the blocks to form segments, then cementing the segments together, and then shaping the form thus substantially provided.

7. The herein described method of constructing bowling pins which consists in cutting a plurality of blocks from a plank substantially parallel with the Wood grain of the plank, then bisecting the blocks to form V-shaped segments, then cementing the segments together to form a unitary structure, and then shaping the structure thus provided.

8. As an article of manufacture, a bowling pinconsisting of a plurality of segments of the full length of the pin and secured together to form a unitary structure having a round central bore, and a round core memher extending snugly into said bore substantially the full length of the segments.

9. As an article of manufacture, a bowl- 15 ing pin consisting of a plurality of segments of the full length of the pin andsecured together to form a unitary structure having a tapered central bore, and a tapered core member extending snugly into said bore 20 substantially the full length of the segments. In testimony whereof I aflix mysignature.

' EPHRAI-M P. GRIGNON. 

